24x30 · Furnace & AC Filter

24x30 air filter — every MERV & depth

The 24x30 is one of the most common US furnace and return-grille sizes. A 1" filter measures about 23.5 × 29.5 × 0.75 in actual. Pick your depth and MERV rating below — higher MERV filters finer particles, so match it to your household.

24x30x1 — 1" depth

Change every 60–90 days. Set a reminder so airflow never drops.

24x30x1 · MERV 8 — Standard protectionfrom $9.54 →24x30x1 · MERV 11 — Allergy & petfrom $13.21 →24x30x1 · MERV 13 — Maximum filtrationfrom $16.88 →

24x30x2 — 2" depth

Change every 3 months. Set a reminder so airflow never drops.

24x30x2 · MERV 8 — Standard protectionfrom $13.95 →24x30x2 · MERV 11 — Allergy & petfrom $17.62 →24x30x2 · MERV 13 — Maximum filtrationfrom $21.29 →

24x30x4 — 4" depth

Change every 6–12 months. Deep media filters last far longer between changes.

24x30x4 · MERV 8 — Standard protectionfrom $22.75 →24x30x4 · MERV 11 — Allergy & petfrom $26.42 →24x30x4 · MERV 13 — Maximum filtrationfrom $30.09 →

Not sure which MERV?

MERV 8

Standard protection

Best for everyday home use — the standard choice to protect your HVAC system.

MERV 11

Allergy & pet

Best for homes with pets or mild allergies.

MERV 13

Maximum filtration

Best for allergy and asthma sufferers, and homes dealing with wildfire smoke.

MERV 8 vs 11 →MERV 11 vs 13 →MERV 8 vs 13 →

← All air filter sizes